Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5377c13ce13d87ce259e4f14f7077e26d8004aa815fdf7b99160a8bca70b11b3' 
  AND token = 'Hup5EvFJUl4yMfHQRfRgxGOjW1fAlD6nIEStKAmuj2A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}